So I've stripped 2 steering horns already and I'm only using the Hitec 645 servo. I had just replaced it last night and I went out to a cool crawling spot today. I crawled around for about 2 mins and the piece o' crap plastic stripped again. So I went into the LHS and they had a Losi aluminum one for my servo. I put it on and so far no problems, but I only messed around crawling a few things in the store because it started raing. It's a little bit shorter than the stock one, maybe and 1/8th of an inch or less. But it's not limiting the steering at all, it'll still hit the lower links if I don't limit it.
Anyways, here's some pics of it.
Anyways, here's some pics of it.

